Cylinder-pin catch for revolvers



(No Model.).

J. BOURKE.

GYLINDER PIN CATCH FOR REVOLVERS.

No. 519,875. Patented May 15, 1894.

"I'I'I'I'.

' 30m Rmm e UNirno STATES PATENT OFFICE.

JOHN BOURKE, OF NORWVIOH, CONNECTICUT.

CYLINDER-PIN CATCH FOR REV OLVERS.

SPECIFICATION forming part of Letters Patent No. 519,875, dated May 15,1894.

Application filed March 1, 1 894.

To all whom it may concern.-

Be it known that I, JOHN BOURKE, a citizen of the United States,residing at Norwich, in the county of New London and State ofConnecticut, have invented certain new and useful Improvements inRevolvers, which improvements are fully set forth and described in thefollowing specification, reference being had to the accompanying sheetof drawings.

This invention has particular relation to the axial pin of thecylinderin revolving fire arms and said invention has for its object toproduce a novel form of latch, or catch for retaining the axial pinwithin the frame of the arm, said catch being so constructed that it mayalso serve as a frictional stop or drag to prevent undue rotation of thecylinder.

In order to most clearly explain my saidinvention I have provided theannexed drawings, in which Figure 1 is a side elevation of a revolverembodying my invention and Fig. 2 shows a sectional view of the frameand cylinder, substantially on line :1::n of Fig. 1. Fig. 3 is anenlarged, detached, view of the axial pin of the cylinder, principallyin longitudinal section, disclosing the combined latch and frictionalstop which forms the essential feature of my invention.

In the drawings the letter a denotes a revolver frame, I) the cylinderand c the axial pin upon which said cylinder revolves when in service.This pin is slotted lengthwise, as best seen in Fig. 3, and within thesaid slot is located a latch at whose rear end is pivoted within the pin0 as at d, thus permitting the forward end of said latch to be swungoutward and inward a limited distance. The outer or free end of saidlatch is formed with a projecting portion d which may be readily engagedto press the latch down into its slot and a suitable spring, here shownas a spiral spring e, is seated within the pin and acts with a constanttendency to force the latch outward into the position shown in fulllinesin Fig. 3. About midway the length of the latch d is a projection(1 which when the axial pin is in place in the frame, lies within thejournal bearing of the cylinder, said bearing being Serial No. 502,016.(No model.)

counter-bored substantially as shown at b in Fig. 2 and the front,angular, end of said projection (1 then lies just inside the frame, asseen in said Fig. 2, serving as a latch or catch to prevent theaccidental withdrawal or dis placement of said axial pin. The exposedend of the pin is flattened as at d and fits closely against the underside of the barrel to prevent rotation of said pin. When the parts arethus assembled the outer face of the projection 01 is forced by spring einto close contact with the circumferential wall of the counter-bore baffording sufficient frictional resistance or drag to hold the cylinderin a position for firing after the latter is revolved by means ofsuitable pawl mechanism.

When it is desired to remove the cylinder for reloading, or cleaning, itis only necessary to press inward the projecting end d of the latch whenthe projection d is moved out of engagement with the frame and the pin 0may be withdrawn from said frame.

Should it be desired for any purpose to revolve the cylinder freelywithout removing it from the frame, it is only necessary to press backthe latch (Z thus throwing the projection d out of frictional contactwith the cylinder,-

when the latter may be freely revolved. 'It will thus be seen that I amable to provide at very small cost in one piece a lock or latch toretain the axial pin within the frame and also an effective frictionaldrag or stop for the cylinder.

Having thus described my invention, I claim- In combination with theframe and cylinder of a revolving arm, aremovable axial pin for saidcylinder having seated therein substantially asset forth aspring-pressed latch provided with a projection d that engages the innerwall of the frame to prevent the withdrawal of the pin, and also thecircumferential wall of the journal bearing of the cylinder to serve asa frictional drag or stop.

JOHN BOURKE.

Witnesses:

FRANK H. ALLEN, LILA. D. PEALE.

